Toothbrush



FIG. 1 is a right side view of a toothbrush showing my new design, the opposite side being a mirror image;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is an end view thereof, viewed from the bristle end; and,

FIG. 5 is the lower end view thereof. 

The ornamental design for a toothbrush, as shown and described. 